How to use Local docker image in kubernetes via kubectl - docker

Question

I created customize Docker Image and stored in my local system Now I want use that Docker Image via kubectl .
Docker image:-
1:- docker build -t backend:v1 .
Then Kubernetes file:-
apiVersion: apps/v1beta1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: backend
namespace: web-console
spec:
replicas: 1
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: backend
spec:
containers:
- env:
- name: mail_auth_pass
- name: mail_auth_user
- name: mail_from
- name: mail_greeting
- name: mail_service
- name: mail_sign
- name: mongodb_url
value: mongodb://mongodb.mongodb.svc.cluster.local/console
- name: server_host
value: "0.0.0.0"
- name: server_port
value: "3000"
- name: server_sessionSecret
value: "1234"
image: backend
imagePullPolicy: Never
name: backend
resources: {}
restartPolicy: Always
status: {}```
Command to run kubectl:- kubectl create -f backend-deployment.yaml
**getting Error:-**
error: error validating "backend-deployment.yaml": error validating data: [ValidationError(Deployment.spec.template.spec.containers[0].env[9]): unknown field "image" in io.k8s.api.core.v1.EnvVar, ValidationError(Deployment.spec.template.spec.containers[0].env[9]): unknown field "imagePullPolicy" in io.k8s.api.core.v1.EnvVar]; if you choose to ignore these errors, turn validation off with --validate=false

Answer 1

Local Registry
Set the local registry first using this command
docker run -d -p 5000:5000 --restart=always --name registry registry:2
Image Tag
Given a Dockerfile, the image could be built and tagged this easy way:
docker build -t localhost:5000/my-image
Image Pull Policy
the field imagePullPolicy should then be changed to Never get the right image from the right repo.
given this sample pod template
apiVersion: v1
kind: Pod
metadata:
name: my-pod
labels:
app: my-app
spec:
containers:
- name: app
image: localhost:5000/my-image
imagePullPolicy: Never
Deploy Pod
The pod can be deployed using:
kubectl create -f pod.yml
Hope this comes in handy :)

Answer 2

As the error specifies unknown field "image" and unknown field "imagePullPolicy"
There is syntax error in your kubernetes deployment file.
Make these changes in your yaml file.
apiVersion: apps/v1beta1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: backend
namespace: web-console
spec:
replicas: 1
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: backend
spec:
containers:
- name: backend
image: backend
imagePullPolicy: Never
env:
- name: mail_auth_pass
- name: mail_auth_user
- name: mail_from
- name: mail_greeting
- name: mail_service
- name: mail_sign
- name: mongodb_url
value: mongodb://mongodb.mongodb.svc.cluster.local/console
- name: server_host
value: "0.0.0.0"
- name: server_port
value: "3000"
- name: server_sessionSecret
value: "1234"
resources: {}
restartPolicy: Always
status: {}
Validate your kubernetes yaml file online using https://kubeyaml.com/
Or with kubectl apply --validate=true --dry-run=true -f deployment.yaml
Hope this helps.